Washing our hands with soap has been one of the most important advances in human hygiene. While we take it for granted, it was only very recently that scientists showed the relevance of washing hands with soap. The aim of our study was to assess the impact of handwashing with soap and nail clipping on the prevention of intestinal parasite reinfections. Intestinal parasitic infections are highly endemic among school-aged children in resource-limited settings, so to lower their impact, preventive measures should be implemented that are sustainable with available resources. This work is still very relevant for all primary health workers dealing with emerging infectious diseases and preventive measure interventions.